Structure for airtight sealing a bottle and bottle cap

ABSTRACT

A bottle sealing structure is formed of a bottleneck, a cap, and a sealing ring. The bottleneck is provided in the outer wall with an outer threaded portion and a retaining ring. The cap is provided in the inner wall with an inner threaded portion, which is engaged with the outer threaded portion of the bottleneck. The sealing ring is attached to the bottom end of the cap by a plurality of connection points, which are separated from one another by a plurality of gaps. The gaps are provided with a protrusion to support the bottom end of the cap. The sealing ring is provided along the bottom fringe with a retaining portion which is retained by the retaining ring of the bottleneck.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates generally to a bottle, and more particularly to a sealing structure of the bottle.

[0003] 2. Description of Related Art

[0004] As illustrated in FIGS. 1-6, the conventional bottle is formed of a cap 10, and a bottle body 14 which is provided at the top end with a neck which is in turn provided in the outer wall with a threaded portion 15 and a toothed portion 16 located under the threaded portion 15. The cap 10 is provided at the bottom end with a sealing ring 11 and a plurality of gaps 17 located between the bottom end of the cap 10 and the sealing ring 11. The sealing ring 11 is provided in the inner wall with a plurality of retaining teeth 13 engageable with the toothed portion 16 of the bottleneck. The sealing ring 11 is attached to the bottom end of the cap 10 by a plurality of connection pieces 12, which are served at such time when the cap 10 is rotated so as to enable the cap 10 to be removed from the bottleneck. The connection pieces 12 are intended to prevent the contents of the bottle from being tampered with.

[0005] In light of the connection pieces 12 being separated from one another by a plurality of gaps 17, the connection pieces 12 are susceptible to severance at such time when the cap 10 is impacted by an external force. In addition, the retaining teeth 13 of the sealing ring 11 are not securely engaged with the toothed portion 16 of the bottleneck. As a result, the sealing ring 11 is apt to turn along with the cap 10 in motion. In other words, both the cap 10 and the sealing ring 11 are removed all together from the bottleneck.

[0006] As shown in FIG. 6, the empty bottle body 14 may be used as a vase and the like. However, the toothed portion 16 of the bottleneck undermines the external appearance of the bottle body 14 serving as a vase. In addition, the toothed portion 16 tends to cause an uncomfortable sensation to the skin which comes in contact with the toothed portion 16.

BRIEF SUMMARY OF THE INVENTION

[0007] The primary objective of the present invention is to provide a bottle with a sealing structure which is free of the deficiencies of the conventional bottle sealing structure described above.

[0008] The features, functions, and advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.

BRIEF DESCIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0009]FIG. 1 shows a perspective view of a prior art bottle with its bottle body being sealed off by a cap.

[0010]FIG. 2 shows an exploded view of the bottle body and the cap of the prior art bottle.

[0011]FIG. 3 shows an exploded view of the bottle body, the sealing ring and the cap of the prior art bottle.

[0012]FIG. 4 shows a cross sectional view of the cap, the sealing ring and the bottle body of the prior art bottle in combination.

[0013]FIG. 5 shows a stretch out schematic view of the bottom end of the cap and the sealing ring of the prior art bottle.

[0014]FIG. 6 shows a perspective view of the bottle body of the prior art bottle.

[0015]FIG. 7 shows an external view of a bottle sealing structure of the preferred embodiment of the present invention.

[0016]FIG. 8 shows an exploded view of the bottle sealing structure of the preferred embodiment of the present invention.

[0017]FIG. 9 shows a longitudinal sectional view of the bottle sealing structure of the preferred embodiment of the present invention in combination.

[0018]FIG. 10 is a longitudinal sectional view of the bottle sealing structure of the preferred embodiment of the present invention to illustrate the separation of the cap from the bottle body.

[0019]FIG. 11 shows a stretch-out schematic view of the bottom end of the cap and the sealing ring of the preferred embodiment of the present invention.

[0020]FIG. 12 shows a perspective view of the bottle body of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0021] As shown in FIGS. 7-11, a bottle sealing structure of the preferred embodiment of the present invention comprises a neck 21 of a bottle body 20, a cap 30, and a sealing ring 40.

[0022] He neck 21 of the bottle body 20 is provided in the outer wall with an outer threaded portion 22 and a retaining ring 23 located under the threaded portion 22. The retaining ring 23 is provided in the upper side with an inclined plane 231, as shown in FIGS. 9 and 10.

[0023] The cap 30 is provided in the inner wall with an inner threaded portion 31 engageable with the outer threaded portion 22 of the bottleneck 21.

[0024] The sealing ring 40 is provided with a retaining portion 41 extending along the bottom fringe of the sealing ring 40. The sealing ring 40 is attached to the bottom end of the cap 30 by a plurality of connection points 32 which are arranged at intervals and are separated from one another by a plurality of gaps 321. The sealing ring 40 is provided along the top fringe with a plurality of supporting protrusions 401, which come in contact with the bottom edge of the cap. The protrusions 401 are located in the gaps 321 to support the cap 30.

[0025] In combination, the cap 30 and the sealing ring 40 are joined with the bottleneck 21 in such a manner that the inner threaded portion 31 of the cap 30 is engaged with the outer threaded portion 22 of the bottleneck 21, and that the retaining portion 41 of the sealing ring 40 is retained by the retaining ring 23 of the bottleneck 21. The inclined plane 231 of the retaining ring 23 of the bottleneck 21 serves as a guiding surface to facilitate the retaining of the retaining portion 41 of the sealing ring 40 by the retaining ring 23 of the bottleneck 21.

[0026] In light of the retaining portion 41 of the sealing ring 40 being retained by the retaining ring 23 of the bottleneck 21, the sealing ring 40 does not turn along with the cap 30 in motion. As a result, the connection points 32 are severed at the time when the cap 30 is turned. In addition, the connection points 32 are not susceptible to severance at such time when the cap 30 is inadvertently impacted on by an external force. This is due to the fact that the bottom end edge of the cap 30 is supported by the protrusions 401 of the top edge of the sealing ring 40.

[0027] As shown in FIG. 12, the outer wall surface of the bottleneck 21 of the preferred embodiment of the present invention is devoid of the toothed structure of the prior art bottleneck.

[0028] The embodiment of the present invention described above is to be regarded in all respects as being merely illustrative and not restrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scopes of the following claims. 

I claim:
 1. A bottle sealing structure comprising: a bottleneck provided in an outer wall with an outer threaded portion; a cap provided in an inner wall with an inner threaded portion which is engaged with said outer threaded portion of said bottleneck; and a sealing ring attached to a bottom end of said cap by a plurality of connection points which are arranged at intervals and are separated from one another by a plurality of gaps; wherein said bottleneck is further provided in the outer wall with a retaining ring whereby said retaining ring is located under said outer threaded portion; wherein said sealing ring is provided along a bottom fringe with a retaining portion whereby said retaining portion is retained by said retaining ring of said bottleneck.
 2. The bottle sealing structure as defined in claim 1, wherein said retaining ring of said bottleneck is provided in an upper side with an inclined plane whereby said inclined plane serves as a guiding surface to facilitate the retaining of said retaining portion of said sealing ring by said retaining ring of said bottleneck.
 3. The bottle sealing structure as defined in claim 1, wherein said gaps are provided with a supporting protrusion in contact with said bottom end of said cap. 